Question

Evaluate the function f (x) = 4 • 7x for x= -1 and x = 2. i know how to write out the equation for it but 7^x is throwing me off. do i change it to '2' or do i solve it, i really need help, i will give medals

Answer 1

\(\large a^{-x}=\frac{1}{a^x}\)

Answer 2

i got f(-1)=4(-1)+7^x

Answer 3

what is 7^-1?

Answer 4

-49?

Answer 5

follow the property I wrote in the first post.
\(\large7^{-4}=\frac{1}{7^4}\\\large5^{-7}=\frac{1}{5^7}\)